AlectorALEC
13F holders, Q2 2025 (June 30)136holders −5
16new positions
21sold out
6famous investors
$1.40avg. 13F price*
At the end of Q2 2025, 136 institutions reported holding Alector Inc. (ALEC) in their 13F filings, down 5 from Q1 2025. 16 opened new positions and 21 sold out. The largest holders were FMR LLC ($21.0M), BlackRock, Inc. ($11.2M) and Vanguard Group Inc. ($8.4M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Alector Inc.
- CUSIP
- 014442107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 16 | $907K |
| Exits | 21 | $14.1M |
All 13F filers, Q1 2025 → Q2 2025: 12,547,614 shares bought and 14,651,993 shares sold, net −2,104,379 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 136 holders
| FMR LLC | 0.00% | Add +4.2% | 14,998,889 | $21.0M |
| BlackRock, Inc. | 0.00% | Reduce -3.7% | 7,973,580 | $11.2M |
| Vanguard Group Inc. | 0.00% | Reduce -1.1% | 5,987,704 | $8.4M |
| T. Rowe Price Associates Inc. | 0.00% | Add +620.9% | 4,875,264 | $6.8M |
| Merck & Co., Inc. | 2.30% | No change | 3,545,719 | $5.0M |
| Acadian Asset Management LLC | 0.01% | Add +50.6% | 2,170,388 | $3.0M |
| Eversept Partners, LP | 0.28% | Add +221.7% | 1,986,072 | $2.8M |
| Geode Capital Management, LLC | 0.00% | Add +1.0% | 1,982,068 | $2.8M |
| ADAR1 Capital Management, LLC | 0.40% | Add +353.2% | 1,723,526 | $2.4M |
| State Street Corp. | 0.00% | Add +4.3% | 1,709,902 | $2.4M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Reduce -0.8% | 1,322,882 | $1.9M |
| Euclidean Capital LLC | 0.60% | No change | 1,307,858 | $1.8M |
| Renaissance Technologies | 0.00% | Add +21.4% | 1,254,850 | $1.8M |
| Deerfield Management Company, L.P. | 0.03% | No change | 1,055,192 | $1.5M |
| 5AM Venture Management, LLC | 0.54% | No change | 995,841 | $1.4M |
| Deutsche Bank AG | 0.00% | Reduce -10.2% | 989,747 | $1.4M |
| Vestal Point Capital, LP | 0.07% | Add +93.6% | 976,992 | $1.4M |
| DAFNA Capital Management LLC | 0.36% | No change | 912,928 | $1.3M |
| Ikarian Capital, LLC | 0.42% | Reduce -5.3% | 900,000 | $1.3M |
| Sio Capital Management, LLC | 0.48% | Add +1.0% | 845,531 | $1.2M |
| Northern Trust Corp. | 0.00% | Reduce -5.6% | 658,161 | $921K |
| TD Asset Management Inc | 0.00% | Add +483.3% | 651,738 | $912K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +3.7% | 647,653 | $907K |
| Morgan Stanley | 0.00% | Add +75.0% | 606,552 | $849K |
| Citadel Advisors | 0.00% | Add +10047.5% | 551,820 | $773K |
| D. E. Shaw & Co. | 0.00% | Add +13.8% | 534,200 | $748K |
| Panagora Asset Management Inc. | 0.00% | Add +41.0% | 516,680 | $723K |
| Boothbay Fund Management, LLC | 0.02% | Add +67.3% | 458,863 | $642K |
| Millennium Management | 0.00% | Add +55.1% | 410,803 | $575K |
| AQR Capital Management | 0.00% | Reduce -17.4% | 406,618 | $569K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -21.7% | 383,331 | $537K |
| Two Sigma Advisers, LP | 0.00% | Reduce -4.0% | 377,000 | $528K |
| Goldman Sachs Group Inc. | 0.00% | Add +20.0% | 374,477 | $524K |
| Royal Bank of Canada | 0.00% | Add +7560.9% | 367,188 | $513K |
| Bank of America Corp. | 0.00% | Add +1.8% | 343,909 | $481K |
| New Leaf Venture Partners, L.L.C. | 0.90% | No change | 339,569 | $475K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +153.1% | 313,578 | $439K |
| Mackenzie Financial Corp. | 0.00% | New | 274,442 | $384K |
| Bank of New York Mellon Corp | 0.00% | Add +7.8% | 268,872 | $376K |
| Walleye Capital LLC | 0.00% | Reduce -12.9% | 266,204 | $373K |
| Diadema Partners LP | 0.23% | Reduce -41.7% | 266,023 | $372K |
| State of Wyoming | 0.04% | Add +13.3% | 223,092 | $312K |
| Two Sigma Investments, LP | 0.00% | Add +3.6% | 222,139 | $311K |
| Susquehanna International Group, LLP | 0.00% | Reduce -19.5% | 203,798 | $285K |
| Alphabet Inc. | 0.01% | No change | 175,866 | $246K |
| Invesco Ltd. | 0.00% | Add +18.3% | 175,801 | $246K |
| Barclays PLC | 0.00% | Add +35.7% | 169,795 | $238K |
| Medici Capital LLC | 0.27% | No change | 167,191 | $234K |
| Nuveen, LLC | 0.00% | Add +12.6% | 155,613 | $218K |
| Los Angeles Capital Management LLC | 0.00% | Add +5.3% | 151,896 | $213K |
| Gsa Capital Partners LLP | 0.01% | New | 150,669 | $211K |
| Rhumbline Advisers | 0.00% | Add +8.5% | 126,568 | $177K |
| Bridgeway Capital Management, LLC | 0.00% | New | 115,000 | $161K |
| STRS Ohio | 0.00% | Add +7.6% | 110,400 | $155K |
| DekaBank Deutsche Girozentrale | 0.00% | No change | 100,000 | $148K |
| Russell Investments Group, Ltd. | 0.00% | Add +87.9% | 100,366 | $144K |
| Alliancebernstein L.P. | 0.00% | Add +13.2% | 92,940 | $130K |
| XTX Topco Ltd | 0.00% | Add +125.2% | 73,338 | $103K |
| Susquehanna Fundamental Investments, LLC | 0.00% | Reduce -48.7% | 70,778 | $99K |
| Cannell & Spears LLC | 0.00% | Reduce -0.2% | 61,513 | $86K |
| Persistent Asset Partners Ltd | 0.07% | Reduce -41.8% | 61,096 | $86K |
| Ieq Capital, LLC | 0.00% | Reduce -26.6% | 58,998 | $83K |
| Velan Capital Investment Management LP | 0.08% | No change | 55,000 | $77K |
| HSBC Holdings PLC | 0.00% | Reduce -11.0% | 51,700 | $74K |
| Bank of Montreal | 0.00% | New | 52,380 | $73K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Add +49.2% | 52,095 | $73K |
| Utah Retirement Systems | 0.00% | No change | 51,430 | $72K |
| Wells Fargo & Company | 0.00% | Add +28.3% | 50,601 | $71K |
| Citigroup Inc. | 0.00% | Reduce -21.2% | 49,461 | $69K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -38.0% | 46,286 | $65K |
| JPMorgan Chase & Co. | 0.00% | Reduce -96.9% | 45,491 | $64K |
| Algert Global LLC | 0.00% | No change | 44,460 | $62K |
| UBS Group AG | 0.00% | Reduce -49.5% | 41,893 | $59K |
| Tudor Investment Corporation | 0.00% | Reduce 0.0% | 40,795 | $57K |
| Intech Investment Management LLC | 0.00% | Reduce -34.3% | 39,915 | $56K |
| Vontobel Holding Ltd. | 0.00% | Add +26.7% | 38,000 | $53K |
| Jasper Ridge Partners, L.P. | 0.00% | No change | 30,632 | $43K |
| Blackstone Inc. | 0.00% | No change | 25,715 | $36K |
| Cwm, LLC | 0.00% | Reduce -23.0% | 25,897 | $36K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 25,570 | $36K |
| Apollon Wealth Management, LLC | 0.00% | No change | 25,000 | $35K |
| Voya Investment Management LLC | 0.00% | No change | 24,621 | $34K |
| Jane Street Group, LLC | 0.00% | Reduce -90.7% | 23,952 | $34K |
| Cerity Partners LLC | 0.00% | Reduce -42.9% | 23,736 | $33K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 21,819 | $31K |
| Graham Capital Management, L.P. | 0.00% | Reduce -48.0% | 21,373 | $30K |
| Prudential Financial Inc. | 0.00% | New | 21,322 | $30K |
| Erste Asset Management GmbH | 0.00% | No change | 19,000 | $28K |
| China Universal Asset Management Co., Ltd. | 0.00% | Add +1.1% | 20,083 | $28K |
| ProShare Advisors LLC | 0.00% | Reduce -9.6% | 20,078 | $28K |
| FNY Investment Advisers, LLC | 0.01% | Add +100.0% | 20,000 | $28K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 17,004 | $24K |
| Sei Investments Co. | 0.00% | No change | 16,884 | $24K |
| DLK Investment Management, LLC | 0.01% | Add +34.8% | 15,500 | $22K |
| Ameriprise Financial Inc. | 0.00% | Add +32.3% | 14,135 | $20K |
| Diversified Trust Co. | 0.00% | No change | 14,102 | $20K |
| Shell Asset Management Co. | 0.00% | Reduce -32.7% | 13,887 | $19K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -40.9% | 13,399 | $19K |
| US Bancorp \de | 0.00% | Reduce -9.0% | 12,427 | $17K |
| BNP Paribas Financial Markets | 0.00% | Reduce -92.6% | 11,634 | $16K |
"% of holder's portfolio" is ALEC's weight in each manager's 13F, not the share of Alector Inc. the manager owns.